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Guy Ottewell

Overtaking the king of planets

This is what the opposition of Jupiter means.

Catch Comet Encke this evening!

The comet’s orbital period is short – only 3.3 years – and the orbit is relatively close to Earth. Encke’s Comet is now on its 63rd known visit to our part of space.

Valentine’s Day

Astronomer Guy Ottewell reflects on the planet of love.

Vesta, brightest asteroid, brightest for 2017

If you’ve never spotted an asteroid, now would be a good time to try. Vesta’s 2017 opposition is around now. Guy Ottewell provides charts and explains more.

Thanksgiving evening

There’s the sky we can see, and, beyond that, a whole universe of objects we can’t see with the eye alone. Guy Ottewell gives you a way to project outward on this Thanksgiving evening.

Where is Proxima Centauri?

You probably know by now that a planet has been discovered around the very nearest star. Guy Ottewell shows you where in space that star is.

Five petals of Venus

A word about the “pentagram” of Venus, a highly noticeable rhythm in the motion of Venus, as viewed from an Earth-centered perspective.

Leap babies

If you’re born on a leap day, do you have birthdays only once every four years?

Venus Valentina

Venus tried to kiss Mercury, but Mercury got away.